| 释义 |
▪ I. perspective, n.|pəˈspɛktɪv|
[ad. med.L. perspectīva (sc. ars), the science of optics, fem. of perspectīvus: see next; cf. F. la perspective (14th c.).]
I.
†1. The science of sight; optics. (Also in pl.)
c1380Wyclif Sel. Wks. II. 299 As tellin men of perspectif, þer ben þree maner of bodili siȝt. 1387Trevisa Higden (Rolls) III. 365 He [Aristotle] made..problemys of perspective and of methaphesik. 1398― Barth. De P.R. iii. xvii. (Tollem. MS.), Þe auctor of þe science of perspectiue [scientiæ perspectivæ], þat is þe science of þe syȝte. 1570Dee Math. Pref. B j, Perspectiue, is an Art Mathematicall, which demonstrateth the maner, and properties, of all Radiations Direct, Broken, and Reflected. 1577Harrison England ii. iii. (1877) i. 78 Skill in the perspectiues. 1625N. Carpenter Geog. Del. i. vii. (1635) 177 The Angle of Vision, as we finde it taught in the Perspectiues. 1658Phillips, Perspective,..the art of advantaging the sight by the contrivance of glasses, being a branch of Opticks.
†2. An optical instrument for looking through or viewing objects with; a spy-glass, magnifying-glass, telescope, etc. Also fig., esp. in such phrases as to look through the wrong end of the perspective = to look upon something as smaller or of less consequence than it is. Obs.
In early use applied to various optical devices, as arrangements of mirrors etc. for producing some special or fantastic effect, e.g. by distortion of images. (Cf. also 4 b.)[In the Chaucer quotation, the word in all the ancient MSS. has the prefix contracted, the Hengwrt, Corpus, and Lansdowne having (according to the Six-text ed.) the contraction p for per, the Ellesmere, Cambridge, Petworth, and Harleian 7334, having that for pro-, which is also the form in the 16th c. printed edd. Notwithstanding this preponderance of MS. testimony, there can be little doubt that the correct reading is perspective, as shown by the history of the two words; prospective, as a genuine word, having arisen only c 1590.] c1386Chaucer Sqr.'s T. 226 (Hengwrt MS.) They speke of Alocen and Vitulon Of Aristotle þat writen in hir lyues Of queynte Mirours and of perspectyues. a1529Skelton Wks. (1843) I. 25 Encleryd myrroure and perspectyue most bryght. c1532G. Du Wes Introd. Fr. in Palsgr. 1045 The perspectif or glasse in the whiche the kindes [printed kindnes] and symilitudes of thynges ben shewed. 1601Shakes. All's Well v. iii. 48 Contempt his scornefull Perspectiue did lend me, Which warpt the line of euerie other fauour. 1634Sir T. Herbert Trav. Ded. A ij b, Like an ill-sighted man, who sees with Spectacles or Perspectives. 1634–5Brereton Trav. (1844) 60 Wm. Daviseon offered to furnish me with a couple of these perspectives, which shew the new-found motion of the stars about Jupiter. 1646Buck Rich. III Ded., To looke at other mens actions and memory by the wrong end of the perspective. 1668Pepys Diary 13 July, To Reeves's; and there saw some [books], and bespoke a little perspective, and was mightily pleased with seeing objects in a dark room. 1692Dryden St. Euremont's Ess. 280 By the means of Great Perspectives, which Invention becomes more perfect every Day, they discover new Planets. 1709Steele & Addison Tatler No. 103 ⁋13, I..refused him a Licence for a Perspective, but allowed him a Pair of Spectacles. 1716Cibber Love's Last Shift i. i, If we look thro' Reason's never-erring Perspective. 1748Anson's Voy. ii. vi. 195 By means of our perspectives..we saw an English flag hoisted. 1789Burns Let. to Mrs. Dunlop 4 Mar., As a snail pushes out his horns, or as we draw out a perspective.
II.
3. a. The art of delineating solid objects upon a plane surface so that the drawing produces the same impression of apparent relative positions and magnitudes, or of distance, as do the actual objects when viewed from a particular point. (Formerly also pl. in same sense.) See also 6 b.
Without qualification, usually denoting linear perspective, an application of projective geometry, in which the drawing is such as would be made upon a transparent vertical plane (plane of delineation) interposed in the proper position between the eye and the object, by drawing straight lines from the position of the eye (point of sight) to the several points of the object, their intersections with the plane of delineation forming the corresponding points of the drawing.
aerial p., isometric p., linear p., parallel p.: see these words. angular perspective = oblique p. conical p., that in which objects are delineated as if projected upon the surface of a vertical cone from a point in its axis, the surface being then unrolled into a plane: so cylindrical p. gauche p., that in which the surface of delineation is not a plane. oblique p., that in which neither side of the principal object is parallel to the plane of delineation, so that the horizontal lines meet at a vanishing point.
1598R. Haydocke tr. Lomazzo Pref. 8 A Painter without the Perspectiues was like a Doctor without Grammer. 1601Holland Pliny xxxv. xi. II. 547 So excellent he was in this perspectiue, that a man would say, his euen, plaine, and flat picture were embossed and raised work. 1694Dryden To Sir G. Kneller 39 Yet perspective was lame, no distance true, But all came forward in one common view. 1702Addison Dial. Medals iii, They have represented their buildings according to the rules of perspective. 1704J. Harris Lex. Techn. I, Aerial Perspective is a Proportionable Diminution of the Teints and Colours of a Picture, when the Objects are supposed to be very remote. 1783Mason Art of Painting 163 Yet deem not, Youths, that Perspective can give Those charms complete by which your works shall live. 1822J. Imison Sc. & Art II. 385 The method of drawing a building..in oblique perspective. 1859Ruskin Perspective Introd. 3 Every picture drawn in true perspective may be considered as an upright piece of glass on which the objects seen through it have been thus drawn.
b. transf. The appearance presented by visible objects, in regard to relative position, apparent distance, etc.
1826Faraday Exp. Res. xxxvii. (1859) 216 The convergence of the rays to one spot..was merely an effect of perspective. 1834M. Somerville Connex. Phys. Sc. xxxvii. (1849) 431 The stars, from the effects of perspective alone, would seem to diverge in the direction to which the solar system was going. 1881Atkinson tr. Helmholtz's Lect. Sci. Subjects Ser. ii. iii. i. 87 Aerial perspective. By this we understand the optical action of the light, which the illuminated masses of air, between the observer and distant objects, give.
c. Mod. Geom. = homology 4.
1857Cayley Coll. Math. Papers III. 5 Triangles are in perspective when the three lines joining the corresponding angles meet in a point, or, what is the same thing, when the three points of intersection of the corresponding sides lie in a line. 1881Casey Sequel to Euclid 77 Triangles whose corresponding vertices lie on concurrent lines have received different names from Geometers... Townshend and Clebsch call them triangles in perspective, and the point O and the line XYZ the centre and the axis of perspective. 1885C. Leudesdorf Cremona's Proj. Geom. iv. 20.
d. fig. The relation or proportion in which the parts of a subject are viewed by the mind; the aspect of a matter or object of thought, as perceived from a particular mental ‘point of view’. Hence the point of view itself; a way of regarding (something).
1605Bacon Adv. Learn. ii. viii. §1 We have endeavoured in these our partitions to observe a kind of perspective, that one part may cast light upon another. 1613Drummond of Hawthornden Cypress Grove Wks. (1711) 120 All, that we can set our eyes on in these intricate mazes of life, is but vain perspective and deceiving shadows, appearing far otherwise afar off, than when..gazed upon at a near distance. 1813Shelley Q. Mab ii. 250 The events Of old and wondrous times..were unfolded In just perspective to the view. 1841Myers Cath. Th. iv. xxxv. 359 Clearly no method can be satisfactory but that which preserves the perspective of history true. 1894H. Drummond Ascent of Man 11 Evolution..has thrown the universe into a fresh perspective. 1907H. Adams Educ. Henry Adams ii. 20 Time and experience, which alter all perspectives. 1934M. Bodkin Archetypal Patterns in Poetry 307 Writing from the psychological standpoint, I intend this statement less as criticism than as recognition of the limitations of the vital perspective present in these essays. 1949R. K. Merton Social Theory iii. ix. 262 Mannheim's inconsistency..stems from an indefinite distinction between incorrectness (invalidity) and perspective (‘onesidedness’). 1963J. T. Waterman (title) Perspectives in linguistics. 1964Gould & Kolb Dict. Social Sci. 262/1 There has been much discussion from many perspectives as to the origins and ‘causes’ of fascism.
e. An apparent spatial distribution or extent in perceived sound. Freq. preceded by a qualifying word, as auditory, sound, etc.
1934Steinberg & Snow in Electrical Engineering (N.Y.) Jan. 12/1 An audience..senses the spatial relations of the instruments of the orchestra. This spatial character of the sounds gives to the music a sense of depth and of extensiveness, and for perfect reproduction should be preserved. In other words, the sounds should be reproduced in true auditory perspective. 1949Frayne & Wolfe Elem. Sound Recording xxxii. 674 Adjustment of the gain of the individual channels also helps in preserving the acoustic perspective. 1961G. Millerson Technique Television Production i. 17 He can warn boom operators against dipping into shot..while assisting them in achieving sound perspective to suit the transmitted picture. 1963Times 12 Jan. 11/3 The sound is all too full and forward, and badly lacking in aural perspective.
4. concr.
a. A drawing or picture in perspective; a ‘view’; spec. a picture so contrived as seemingly to enlarge or extend the actual space, as in a stage scene, or to give the effect of distance.
1644Evelyn Diary 27 Feb., In the upper walkes are two perspectives, seeming to enlarge the allys. Ibid. 1 Mar., A little Garden, which, tho' very narrow, by the addition of a well-painted perspective, is to appearance greatly enlarged. 1648in Bury Wills (Camden) 217, I give him alsoe my two perspectives of Saint Marke, hanging in the chamber of my laboritary. 1651J. Jane (title) Εικων ακλαστος. The Image Vnbroken. A Perspective of the Impudence, Falshood [etc.] in a Libell entitled Εικονοκλαστης against Εικων βασιλικη. 1664Power Exp. Philos. Pref. 18 Outside Fallacies; like our Stage-scenes or Perspectives, that shew things inwards, when they are but superficial paintings. 1680Aubrey in Lett. Eminent Persons (1813) III. 501, I have a curious designe of his to drawe a landskip or perspective. 1703Oliver in Phil. Trans. XXIII. 1404 A Perspective of the late King of Denmark's Family, the Queen's Face being in the middle, and eight Princes and Princesses round her. 1858Hawthorne Fr. & It. Note-Bks. II. 77 A vista of cypress-trees, which were indeed an illusory perspective, being painted in fresco. 1861Thackeray Four Georges i. (1862) 60 Hogarth's lively perspective of Cheapside.
†b. A picture or figure constructed so as to produce some fantastic effect; e.g. appearing distorted or confused except from one particular point of view, or presenting totally different aspects from different points. Obs.
1593Shakes. Rich. II, ii. ii. 18 For sorrowes eye..Diuides one thing intire, to many obiects, Like perspectiues, which rightly gaz'd vpon Shew nothing but confusion, ey'd awry, Distinguish forme. 1601― Twel. N. v. i. 224 One face, one voice, one habit, and two persons, A naturall Perspectiue, that is, and is not. 1610B. Jonson Alch. iii. iv, Hee'll shew a perspectiue, where on one side You shall behold the faces, and the persons Of all sufficient yong heires, in towne,..On th' other side, the marchants formes, and others That..will trust such parcels: In the third square, the verie street, and signe Where the commoditie dwels. [Cf. 1661 J. Powell Hum. Industry vi. 76; and 1686Plot Staffordsh. ix. §100, where perspectives are described, but not named.]
†c. So, in similar senses, piece of perspective. (Sometimes = peep-show.) Obs.
1599B. Jonson Ev. Man out of Hum. iv. iv, To view 'hem (as you'ld doe a piece of Perspectiue) in at a key-hole. 1621Burton Anat. Mel. ii. ii. iv. (1624) 233 Those excellent landskips and Dutch-workes,..such pleasant peeces of perspective. 1662J. Davies tr. Olearius' Voy. Ambass. 16 A Walking-Staff, Vermilion Gilt, in which was a piece of Perspective. 1662Stillingfl. Orig. Sacr. ii. v. §8 To direct them in those excellent pieces of Perspective, wherein by the help of a Prophetick glass they might see the Son of God fully represented. 1665Sir T. Herbert Trav. (1677) 151 Besides these upon the same Mountains some pieces of Perspective are elaborately and regularly cut, resembling the noblest sort of ancient structure. 1755Young Centaur vi. Wks. 1757 IV. 262 As in some pieces of perspective, by the pressure of the eye..the magnificent prospect is opened, and aggrandized, still more and more.
5. a. A visible scene; a (real) view or prospect; esp. one extending in length away from the spectator and thus showing distance, a vista.
(In mod. use associated with sense 3.)
1620Shelton Quix. III. xiv. 94 He saw the self-same Face,..the same Aspect, the same Physiognomy, the same Shape, the same Perspective of the Batchelor Samson Carrasco. 1652Loveday tr. Calprenede's Cassandra iii. 156 The frontispeece did discover it selfe in perspective through a long walk of goodly trees. 1686Dryden To Mem. Mrs. Anne Killigrew 115 Of lofty trees, with sacred shades And perspectives of pleasant glades. 1712Spect. No. 524 ⁋5 At the end of the Perspective of every strait Path,..appeared a high Pillar. 1770Gray Let. to Wharton 18 Apr., The lofty towers and long perspectives of the church. 1791Mrs. Radcliffe Rom. Forest ii, Dark hills, whose outline appeared distinctly upon the vivid glow of the horizon, closed the perspective. 1859Jephson Brittany ii. 21 Mysterious perspectives among pillars and arches.
b. fig. A mental view, outlook, or prospect, esp. through an imagined extent of time, past or (usually) future; hence sometimes = expectation, ‘look-out’.
1762Goldsm. Cit. W. xxx, I saw a long perspective of felicity before me. 1796H. Hunter tr. St. Pierre's Stud. Nat. (1799) I. 438 This perspective of a divine felicity, here below, would throw us into a lethargic rapture. 1879Farrar St. Paul II. 255 The concluding words of this section..open a glorious perspective of ultimate hope for all whose hearts are sufficiently large and loving to accept it. 1965Economist 6 Mar. 989/2 Only a general negotiation can offer the perspective of a return to peace and a real independence.
6. Phr. in perspective.
a. In mental view; in prospect, looked for, expected: see 5 b. ? Obs.
(In quot. 1633 the sense is doubtful.)
1633G. Herbert Temple, Sinne ii, Yet as in sleep we see foul death, and live: So devils are our sinnes in perspective. 1640C. Harvey Synagogue xiv. Bible, 'Tis heaven in perspective, and the bliss Of glory here. 1849C. Brontë Shirley xi, Take care of this future magistrate, this church⁓warden in perspective.
b. Drawn or viewed in accordance with the rules or principles of perspective; also fig.: see 3.
1655Marquis of Worcester Cent. Inv. §97 An instrument whereby an ignorant person may take any thing in Perspective, as justly, and more then the skilfullest Painter can do by his eye. 1806Med. Jrnl. XV. 10 My delineations..together with one done by a friend in perspective. 1821Craig Lect. Drawing v. 282 The tops of the trees..receding in perspective into the distance. 1902Daily Chron. 16 July 3/2 The engraver said he must..‘put it in proper perspective’.
c. Mod. Geom. = in homology: see 3 c.
III. †7. The action of looking into something, close inspection; the faculty of seeing into a thing, insight, penetrativeness. Obs.
a1586Queen Elizabeth Let. to Jas. VI (Camden) 173, I haue not so smal a parspectiue in my neighbors actions, but I haue foresene some wicked euent to folowe a careles gouvernement. 1622Bacon Hen. VII 23 Doubting that there would bee too neare looking, and too much Perspectiue into his Disguise, if he should show it here in England; he..sailed with his scholar into Ireland. 1643Milton Divorce ii. xvii, And this also will be somewhat above his reach, but yet no lesse a truth for lack of his perspective. a1649Drummond of Hawthornden Poems Wks. (1711) 24 To me this world did once seem sweet and fair, While senses light minds perspective kept blind.
IV.
8. attrib. perspective control; perspective-free, perspective-suggesting adjs.; perspective shell [in allusion to its markings], the depressed conical shell of the gastropod mollusc Solarium perspectivum; also called sundial shell and staircase shell.
1971C. Bonington Annapurna South Face App. F. 285, I used 2 Nikon bodies, with 24-mm. and 35-mm. perspective-control lenses, [etc.].
1966R. L. Gregory Eye & Brain ix. 163 It would be interesting to bring animals up in a perspective-free environment. 1890Cent. Dict., Perspective shell.
1880W. James Let. 12 Dec. in R. B. Perry Tht. & Char. W. James (1935) I. 727 Metaphors and epigrams which, witty and striking and perspective-suggesting as they often are,..may be in danger of having the changes rung on them too long.
Hence perˈspective v. trans., to set in perspective; also intr., to draw a plan of the perspective of a drawing, etc. Hence perˈspectived ppl. a., placed or drawn in perspective; perˈspectiveless a., devoid of perspective, drawn without regard to perspective (in quot. fig.); † perˈspectiver, † perspecˈtivian, one who treats of perspective.
1598R. Haydocke tr. Lomazzo ii. 197 The Perspectiuers call it, the Center, Marke, Point, Terme, and the Cone of the Pyramis. 1569J. Sandford tr. Agrippa's Van. Artes 34 b, The Geometricians and Perspectiuians. 1812B. R. Haydon Jrnl. 4 Apr. in Autobiogr. (1853) I. x. 171 Began my picture—perspectived the greater part of the day—felt a sort of check in imagination at the difficulties I saw coming. 1874H. R. Reynolds John Bapt. vii. 420 Blended in one dazzling but perspectiveless picture. 1902Westm. Gaz. 12 Sept. 2/1 Towers, battlements, cypresses, statues all perspectived not merely for the eye but for the imagination. 1908Ibid. 8 Aug. 4/1 A certain aimlessness, casualness almost, has suddenly been perspectived into purpose and plan. 1949Brooks & Warren Mod. Rhetoric xiii. 442 It is the prose of a mind which is arranging its world, by delicate adjustments and careful discriminations, into a perspectived pattern. 1970Nature 4 July 93/1 From the perspectiveless drawing of the Ancient Egyptians to the deliberate mixing of contradictory signs of depth by Hogarth and later artists. 1978Gramophone July 181/1 These arrangements even make more comfortable and perspectived listening than the harpsichord originals.
▪ II. perspective, a.|pəˈspɛktɪv|
[ad. late L. perspectīv-us (Boeth.), f. perspect-, ppl. stem of perspicĕre: see perspection and -ive; cf. F. perspectif, -ive (14th c.).]
I.
†1. Relating to sight; optical. Obs.
1432–50tr. Higden (Rolls) III. 365 This saide Aristotill..made..problemes perspective [perspectiva problemata] and metaphisicalle. 1477Norton Ord. Alch. v. in Ashm. Theat. Chem. Brit. (1652) 61 Science Perspective giveth great evidence, To all the Ministers of this Science. 1530Palsgr. 320/2 Perspectyfe, beholdyng or regarding with the eye, perspectif. 1551Recorde Pathw. Knowl. Pref. Archimedes..dyd also by arte perspectiue (whiche is a parte of geometrie) deuise such glasses within the towne of Syracusæ, that dyd bourne their enemies shyppes a great way from the towne. 1592R. D. Hypnerotomachia 27 The entrie, which was by my perspective judgement twelve paces.
†2. Used for looking or viewing; serving to look through, or to assist the sight: applied to various optical instruments or devices. Also fig. Obs. Almost always in phr. perspective glass = prec. 2.
1570Dee Math. Pref. B j, He may wonderfully helpe him selfe, by perspectiue Glasses. 1594Plat Jewell-ho. iii. 6 A perspectiue Ring that will discouer all the Cards that are neere him that weareth it on his finger. 1613Fletcher, etc. Honest Man's Fort. iv. i, This vizard wherewith thou wouldst hide thy spirit Is perspective to shew it plainlier. 1614Raleigh Hist. World i. vii. §2 (1634) 85 A worthy Astrologer now living [Galileo] who by the helpe of perspective Glasses hath found in the Starres many things unknowne to the Ancients. c1619Wotton Let. to Bacon in Reliq. (1651) 414 He [Kepler] applies a long perspective-trunke..with the convexe glasse fitted to the said hole. a1626Bacon New Atl. (1650) 30 We have also Perspective-Houses, where we make Demonstrations of all Lights, and Radiations: And of all Colours. 1674Lond. Gaz. No. 931/4 To be sold at the Sign of the Royal Exchange,..all sorts of Perspective Glasses, as well Telescopes as Microscopes. 1727Pope, etc. Art of Sinking ii. v, His eyes should be like unto the wrong end of a perspective glass, by which all the objects of nature are lessened. 1729Savage Wanderer i. 144 If tubes perspective hem the spotless prize. [1837Whewell Hist. Induct. Sc. v. (1857) I. 300 Observed by Galileo Galilei..by the assistance of a perspective glass.] 1852Thackeray Esmond II. x. 174 We have but to change the point of view, and the greatest action looks mean; as we turn the perspective-glass, and a giant appears a pigmy. 1859Dickens T. Two Cities v. 59 If a girl..swoons within a yard or two of a man's nose, he can see it without a perspective-glass. 1867Atlantic Almanac 1868 9 So thought Lonson Nash,..who saw it [sc. a sea-serpent] through a perspective-glass in the year 1817.
II.
3. a. Of or pertaining to perspective (see prec. 3); drawn according to perspective; showing the effect of distance, as a picture or actual scene (cf. prec. 4, 5). † perspective piece = piece of perspective: see prec. 4 c (obs.).
1606Dekker Sev. Sinnes i. (Arb.) 17 You may behold now in this Perspectiue piece which I haue drawne before you, how deadly and dangerous an enemy to the State this Politick Bankruptisme hath bin, and still is. 1617Moryson Itin. i. 84 The painting of the arched-roof, rare for perspectiue Art, and the chiefe of that kinde. 1628Burton Anat. Mel. ii. ii. iv. 259 Brokes, riuers, trees..with many pretty landskips, and perspectiue peices. 1731W. Halfpenny Perspective 1 To find the Perspective Plan of a Square or Cube fixt above the Eye, whose Point of Sight is in a Right Line, with the Middle of the Object. 1777P. Thicknesse Year's Journey I. p. xiii, I might raise..money sufficient to pay for engraving a perspective view of Montserrat. 1813Scott Trierm. iii. xxviii, A fair arcade, In long perspective view display'd. 1850J. Leitch tr. C. O. Müller's Anc. Art §99 (ed. 2) 67 The art of painting..made such progress, especially in the perspective treatment of subjects, as enabled it to appear in great perfection at the very beginning of the next period. 1871Mrs. Gatty Parables fr. Nature Ser. v. 67 That far-off visionary point where all perspective lines converge. 1871J. R. Dicksee Perspective i. 1 Perspective drawing is so termed, because in the study of it, all objects are supposed to be seen through a transparent plane. 1911Encycl. Brit. XX. 470/2 A fresco of ‘The Flood’ at Florence is even more naive in its parade of the painter's [sc. Uccello's] newly won skill in perspective science. Ibid. XXI. 257/2 A horizontal plane on which we suppose the objects to rest of which a perspective drawing is to be made. 1935Burlington Mag. Apr. 200/1 This artist's work, including his portraits, perspective pieces and genre subjects. 1942D. D. Runes Dict. Philos. 230/2 In epistemology: the perspective predicament, the limited though real viewpoint of the individual; the plight of being confined to the experience of only part of actuality. 1959W. C. Lounsbury Backstage from A to Z 34 Perspective drawings of sets executed to dimension can be of great value, but avoid misleading, haphazard drawings which merely confuse. 1959P. & L. Murray Dict. Art & Artists 236 The basic assumption of all perspective systems is that parallel lines never meet, but that they appear to do so. 1961Architect & Building News 21 June 822/2 The perspective drawing realistically illustrates this interesting feature of the design. 1961G. Millerson Technique Television Production iii. 31 (caption) Viewing from too close or too far makes its perspective look unnatural. This is termed perspective distortion. 1970Oxf. Compan. Art 843/1 Shortly after Brunelleschi made his perspective demonstrations his fellow architect Alberti devised a perspective construction for the special use of painters, which he described in detail in his famous treatise On Painting (1436)... This is the first known written account of a fully scientific perspective construction. 1972Jrnl. Social Psychol. LXXXVII. 143 The average number of illusion supporting responses was scored for each of five geometric illusions... Muller-Lyer..; Sander parallelogram..; perspective drawing.
b. Mod. Geom. Belonging to perspective (prec. 3 c) or homology; homologous, homological.
1885C. Leudesdorf Cremona's Proj. Geom. 3 We are said to project from a centre (or vertex) S a given figure σ upon a plane of projection σ′. The new figure σ′ is called the perspective image or the central projection of the original one.
¶4. ? Misused for prospective. (But cf. prec. 6 a.)
1709Mrs. Manley Secret Mem. (1736) III. 274 My Hand, unable to support the Pen, drops in perspective Extasies. 1796J. Bidlake in New Ann. Reg. 155 O blindness to the future! That kindly veils sharp pain's perspective ills. |